#include "../common/dispatcher.hpp"
#include "../client/rpc_client.hpp"
#include "rpc_router.hpp"
#include "rpc_registry.hpp"
#include "rpc_topic.hpp"

namespace rpc {
    namespace server {
        class RegistryServer {
        public:
            using ptr = std::shared_ptr<RegistryServer>;

            RegistryServer(int port)
                :_pd_manager(std::make_shared<PDManager>())
                ,_dispatcher(std::make_shared<rpc::Dispatcher>())
            {
                auto service_cb = std::bind(&PDManager::onServiceRequest, _pd_manager.get(), std::placeholders::_1, std::placeholders::_2);
                _dispatcher->registerHandler<ServiceRequest>(MType::REQ_SERVICE, service_cb);

                _server = rpc::ServerFactory::create(port);
                auto message_cb = std::bind(&rpc::Dispatcher::onMessage, _dispatcher.get(), std::placeholders::_1, std::placeholders::_2);
                _server->setMessageCallback(message_cb);

                auto close_cb = std::bind(&RegistryServer::onConnShutdown, this, std::placeholders::_1);
                _server->setCloseCallback(close_cb);
            }

            void start() {
                _server->start();
            }

        private:
            void onConnShutdown(const BaseConnection::ptr& conn) {
                _pd_manager->onConnShutdown(conn);
            }

        private:
            PDManager::ptr _pd_manager;
            Dispatcher::ptr _dispatcher;
            BaseServer::ptr _server;
        };

        class RpcServer {
        public:
            using ptr = std::shared_ptr<RpcServer>;
            // rpc_server 端有两套地址信息：
            // 1.rpc服务提供段地址信息 -- 必须是rpc服务器对外访问地址（云服务器 —— 监听地址和访问地址不同）
            // 2.注册中心服务端地址信息 -- 启用服务注册后，连接注册中心进行服务注册用的
            RpcServer(const Address& access_addr, bool enableRegistry = true, const Address& registry_server_addr = Address())
                :_enableRegistry(enableRegistry)
                ,_access_addr(access_addr)
                ,_router(std::make_shared<rpc::server::RpcRouter>())
                ,_dispatcher(std::make_shared<rpc::Dispatcher>())
            {
                if(enableRegistry) {
                    _req_client = std::make_shared<client::RegistryClient>(registry_server_addr.first, registry_server_addr.second);
                }
                // 当前成员是一个rpc_server，用于提供rpc服务
                auto rpc_cb = std::bind(&RpcRouter::onRpcRequest, _router.get(), std::placeholders::_1, std::placeholders::_2);
                _dispatcher->registerHandler<rpc::RpcRequest>(rpc::MType::REQ_RPC, rpc_cb);

                _server = rpc::ServerFactory::create(access_addr.second);
                auto message_cb = std::bind(&rpc::Dispatcher::onMessage, _dispatcher.get(), std::placeholders::_1, std::placeholders::_2);
                _server->setMessageCallback(message_cb);
            }

            void registerMethod(const ServiceDescribe::ptr& service) {
                if(_enableRegistry) {
                    _req_client->registryMethod(service->method(), _access_addr);
                }
                _router->registerMethod(service);
            }

            void start() {
                _server->start();
            }
        private:
            bool _enableRegistry;
            Address _access_addr;
            client::RegistryClient::ptr _req_client;
            RpcRouter::ptr _router;
            Dispatcher::ptr _dispatcher;
            BaseServer::ptr _server;
        };

        class TopicServer {
        public:
            using ptr = std::shared_ptr<TopicServer>;

            TopicServer(int port)
                :_topic_manager(std::make_shared<TopicManager>())
                ,_dispatcher(std::make_shared<rpc::Dispatcher>())
            {
                auto topic_cb = std::bind(&TopicManager::onTopicRequest, _topic_manager.get(), std::placeholders::_1, std::placeholders::_2);
                _dispatcher->registerHandler<TopicRequest>(MType::REQ_TOPIC, topic_cb);

                _server = rpc::ServerFactory::create(port);
                auto message_cb = std::bind(&rpc::Dispatcher::onMessage, _dispatcher.get(), std::placeholders::_1, std::placeholders::_2);

                _server->setMessageCallback(message_cb);

                auto close_cb = std::bind(&TopicServer::onConnShutdown, this, std::placeholders::_1);
                _server->setCloseCallback(close_cb);
            }

            void start() {
                _server->start();
            }

        private:
            void onConnShutdown(const BaseConnection::ptr& conn) {
                _topic_manager->onShutdown(conn);
            }
        private:
            TopicManager::ptr _topic_manager;
            Dispatcher::ptr _dispatcher;
            BaseServer::ptr _server;
        };
    }
}